... ,good quality This machine is specialized in deep hole drilling purpose with properties of high efficiency, high accuracy and ... and aeronautics..specificationTechnical dataDrilling holes diameter rangeΦ3-30mmMax deep hole depth2500mm,2000mm,1500mm,1000mm,600mmDrilling box spindle speed ... action driven by A.C servo motor, transmitted by ball screw Adopt guide-way conglutinated plastic, smooth running ...